Diamond



FIG. 1 is a top plan view of a diamond showing our new design;

FIG. 2 is a bottom plan view;

FIG. 3 is a left front corner plan view, the right front corner being identical;

FIG. 4 is a left side plan view, the right side plan view being a mirror image; and,

FIG. 5 is a front plan view, the rear plan view being identical.

The portions of the stone shown in broken lines in FIGS. 1-5 are for environmental purposes only and form no part of the claimed design. 

The ornamental design for a diamond, shown and described in the drawings. 